EP1344010A1 - Systeme de fixation aux fins de trempe - Google Patents
Systeme de fixation aux fins de trempeInfo
- Publication number
- EP1344010A1 EP1344010A1 EP01999776A EP01999776A EP1344010A1 EP 1344010 A1 EP1344010 A1 EP 1344010A1 EP 01999776 A EP01999776 A EP 01999776A EP 01999776 A EP01999776 A EP 01999776A EP 1344010 A1 EP1344010 A1 EP 1344010A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sawblades
- hardening
- hardening fixture
- fixture
- fixture according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
- F27D5/005—Supports specially adapted for holding elongated articles in an upright position, e.g. sparking plugs
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/24—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for saw blades
Definitions
- Sawblades for metal are commonly made with teeth from high-speed steel, or sometimes wholly from high-speed steel, which refers to steel alloys containing tungsten and chromium.
- high-speed steel which refers to steel alloys containing tungsten and chromium.
- the saw blades must be hardened at a very high temperature, normally by heating to a temperature around 1200 degrees C during a few minutes, followed by rapid cooling with gas or liquid, and thereafter annealing during up to 60 minutes at around 550 degrees C.
- the hardening temperature of 1200 degrees C is so high, that any other steel alloy would be deformed even during such a short heating period, and traditionally sawblades for metal have been hardened while suspended vertically from a chain conveyor, and then being heated by radiation or salt bath, followed by cooling by cold gas or oil immersion.
- Important disadvantages of handling suspended saw blades is the time needed for mounting and dismounting, and the relatively great distance between the hanging blades which gives the hardening oven a low production capacity unless it is made very spacious.
- Hardening ovens are also known where the sawblades are tightly packed in fixtures as in the patent US 6,147,328, but that makes it difficult to get a sufficiently fast and even cooling.
- the present invention concerns a fixture which allows rapid uniform heating and cooling of a large number of sawblades within a limited space, and which is constructed in such a way that deformation of the sawblades and fixture at the high temperature is prevented.
- Figure 1 shows a hardening fixture with sawblades standing therein
- Figure 2 shows a part of an opened hardening fixture with sawblades.
- the hardening fixture should confine a large number of sawblades with such reduced mobility that they will not be deformed at the high temperature, but yet with enough mobility to allow uniform cooling thereafter by a gas flow.
- Another purpose is that the hardening fixture should be made from such a material that will not itself be deformed or affected by repeated heating and cooling, and that will not cause chemical alterations of the sawblades at the points where they contact the hardening fixture.
- a third purpose is that the hardening fix- ture should confine the sawblades without contact forces between the blades, because contact forces can make the sawblades stick to each other by diffusion welding.
- a hardening fixture according to the invention is made such that it can simultaneously confine and support a large number of sawblades 10, preferably up to 300 pieces depending on their thickness. They are standing vertically supported on their lower ends 12 and have upper ends 11 that are free but oriented by the hardening fixture. The flat lateral surfaces of the sawblades are close to each other without any compressive force.
- the number of saw blades in the hardening fixture may vary depending on the thickness of the sawblades. Since the saw- blades are standing vertically, the same fixture can be used for sawblades with different lengths within some limits, and for sawblades with different shapes of their ends, also without holes.
- the hardening fixture comprises a bottom plate 13 rigidly connected to two vertical pillars 14 an two separate side plates 15.
- Each vertical pillar can be made with a uniform U-shaped section, or assembled from flat components.
- Each side plate is provided with an upper guiding strip 16, a lower guiding strip 17 and at least two vertical strips 18, and has lateral openings between the strips.
- the vertical strips are provided with distance elements 19.
- the bottom plate can be provided with guiding elements 20.
- the second side plate is then placed on the first side plate, and both side plates with the sawblades between them are inserted between the vertical pillars 14 until the lower ends 12 of the sawblades touch the bottom plate 13.
- the side plates can at first be inserted between the vertical pillars, and bundles of sawblades can later be inserted between the distance elements, and if this method is used, the side plates can be connected to each other by the distance elements. If the side plates 15 have more than two vertical strips 18 there are spaces for more than one bundle of sawblades, but all spaces need not be filled.
- the hardening fixture with the sawblades standing in it is carried by a conveyor into a heating zone between two radiating heater plates which may be electrically heated to a predeter- mined temperature.
- the heater plates are located so close to the hardening fixture that the sawblades and the hardening fixture are rapidly heated through the lateral openings.
- the side plates 15 keep the sawblades parallel at a desired uniform distance from the heater plates.
- the ends 11 ,12 of the sawblades are hidden by the guiding strips 16,17 and will not be heated as much, which will give them a desir- able greater toughness and lower hardness.
- the hardening fixture and the sawblades are thereafter carried to a cooling zone where gas of a predetermined temperature is blown against the edges of the sawblades through a multitude of nozzles located very close to the lateral openings. Since the sawblades are not pressed together, and by gradual motion of the hardening fixture relative to the nozzles, the saw- blades will vibrate relative to each other and allow the gas to penetrate between them to cause an even cooling.
- the hardening fixture may be made to allow placing of the wider sawblades in another angle than perpendicular to the side plates 15, which may also be simplified if the sides of the distance elements 19 facing the sawblades each one is formed with that angle.
- the hardening fixture is made from graphite, preferably reinforced with carbon fibres. Direct contact of graphite or carbon fibres with steel at those high temperatures would cause carbon diffusion into the steel and a corresponding increase of brittleness, which is not allowed.
- the surfaces of the hardening fixture, especially the side plates 15, the distance elements 19 and the bottom plate 13, which might get in contact with the steel of the sawblades must therefore be covered with a thin layer of a wear resistant material 21 not containing carbon or other substances which might diffuse into the steel to deteriorate its properties, but still stable at high tempera- tures. Examples of such materials are ceramics as boron nitride, silicon nitride, silicon dioxide, zirconium oxide are aluminium oxide. Certain high temperature resistant metals such as molybdenum or chromium alloys may be used.
- the design of the hardening fixture may to some extent be varied and adapted to special shapes of the sawblades or the conveyor used for carrying the hardening fixture through the hardening plant.
- the number of vertical strips may be varied, and if desired the bottom plate may be made to accommodate several parallel pairs of side plates.
- the vertical pillars 14 might also be integrated with the side plates 15 or the distance elements 19.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0004521A SE519720C2 (sv) | 2000-12-07 | 2000-12-07 | Härdningsfixtur för samtidig härdning av ett flertal sågblad |
SE0004521 | 2000-12-07 | ||
PCT/SE2001/002696 WO2002046674A1 (fr) | 2000-12-07 | 2001-12-06 | Systeme de fixation aux fins de trempe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1344010A1 true EP1344010A1 (fr) | 2003-09-17 |
EP1344010B1 EP1344010B1 (fr) | 2006-11-08 |
Family
ID=20282133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01999776A Expired - Lifetime EP1344010B1 (fr) | 2000-12-07 | 2001-12-06 | Systeme de fixation aux fins de trempe |
Country Status (9)
Country | Link |
---|---|
US (1) | US7060221B2 (fr) |
EP (1) | EP1344010B1 (fr) |
CN (1) | CN100366996C (fr) |
AU (1) | AU2002218636A1 (fr) |
BR (1) | BR0115756B1 (fr) |
DE (1) | DE60124422T2 (fr) |
SE (1) | SE519720C2 (fr) |
TW (1) | TW541344B (fr) |
WO (1) | WO2002046674A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101899561B (zh) * | 2010-08-03 | 2014-09-03 | 宫电高周波设备(上海)有限公司 | 齿条淬火夹具 |
CN103374645A (zh) * | 2012-04-13 | 2013-10-30 | 于强 | 一种涡轮增压器转子轴加工工艺 |
CN103849727B (zh) * | 2012-11-28 | 2016-01-20 | 大连圣特金属新材料研发有限公司 | 一种t8钢锯条高温淬火装置及其使用方法 |
CN110331269B (zh) * | 2019-08-07 | 2020-11-13 | 沈阳飞机工业(集团)有限公司 | 一种机加框零件热处理控形夹具及装夹方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1233193A (en) * | 1917-03-09 | 1917-07-10 | Lawrence Le Roy Cook | Apparatus for treating saws. |
US1600266A (en) * | 1925-04-01 | 1926-09-21 | Armstrong Frederick | Clamp for holding knives |
US2039927A (en) * | 1935-11-25 | 1936-05-05 | Mckee Glass Company | Glass annealing nesting rack |
US2954222A (en) * | 1959-10-14 | 1960-09-27 | Syracuse Heat Treating Corp | Work supporting fixture |
DE3124252C1 (de) * | 1981-06-19 | 1983-03-31 | Kraft Hausherr GmbH & Co KG, 4322 Sprockhövel | "Vorrichtung zum Zusammenpressen von Werkstücken während einer Wärmebehandlung" |
DE3408944C2 (de) * | 1984-03-12 | 1986-11-20 | Limque, Ferdinand, 4190 Kleve | Einrichtung zum Härten flacher Werkstücke |
DD242428B1 (de) * | 1985-08-19 | 1988-06-29 | Ve Kom Forsttechnik Waren Stam | Verfahren und einrichtung zum haerten von stahlblechen |
DE19651408C2 (de) * | 1996-12-11 | 2001-04-19 | Fraunhofer Ges Forschung | Werkstückträger zum Wärmebehandeln von Werkstücken und Verwendung des Werkstückträgers |
DE19737212A1 (de) * | 1997-08-27 | 1999-03-04 | Fraunhofer Ges Forschung | Werkstückträger zum Wärmebehandeln von Werkstücken |
DE29721475U1 (de) | 1997-12-05 | 1998-02-19 | Ipsen International GmbH, 47533 Kleve | Spannvorrichtung zum Einspannen von dünnwandigen Werkstücken |
US6210500B1 (en) * | 1999-11-04 | 2001-04-03 | Federal-Mogul World Wide, Inc. | Method of heat treat hardening thin metal work pieces |
-
2000
- 2000-12-07 SE SE0004521A patent/SE519720C2/sv not_active IP Right Cessation
-
2001
- 2001-12-06 EP EP01999776A patent/EP1344010B1/fr not_active Expired - Lifetime
- 2001-12-06 AU AU2002218636A patent/AU2002218636A1/en not_active Abandoned
- 2001-12-06 BR BRPI0115756-6A patent/BR0115756B1/pt not_active IP Right Cessation
- 2001-12-06 WO PCT/SE2001/002696 patent/WO2002046674A1/fr active IP Right Grant
- 2001-12-06 CN CNB018200184A patent/CN100366996C/zh not_active Expired - Fee Related
- 2001-12-06 US US10/433,468 patent/US7060221B2/en not_active Expired - Lifetime
- 2001-12-06 DE DE60124422T patent/DE60124422T2/de not_active Expired - Lifetime
- 2001-12-11 TW TW090130605A patent/TW541344B/zh not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0246674A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE0004521L (sv) | 2002-06-08 |
WO2002046674A1 (fr) | 2002-06-13 |
CN100366996C (zh) | 2008-02-06 |
EP1344010B1 (fr) | 2006-11-08 |
SE519720C2 (sv) | 2003-04-01 |
CN1478192A (zh) | 2004-02-25 |
BR0115756A (pt) | 2003-12-30 |
TW541344B (en) | 2003-07-11 |
DE60124422T2 (de) | 2007-10-11 |
BR0115756B1 (pt) | 2009-12-01 |
SE0004521D0 (sv) | 2000-12-07 |
DE60124422D1 (de) | 2006-12-21 |
AU2002218636A1 (en) | 2002-06-18 |
US7060221B2 (en) | 2006-06-13 |
US20040036203A1 (en) | 2004-02-26 |
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